JPS6139251A - Magnetic recording optical reproducing device - Google Patents

Abstract

PURPOSE:To attain miniaturization of the device and to decrease the time delay after recording until reproduction by providing a reproduction optical transmission hole to a slider having a recording magnetic head element section. CONSTITUTION:A part of a slider 24 including a Winchester head 21 serving as a recording magnetic head element is formed by a soft magnetic substance 23, other part of the slider 24 is formed by the nonmagnetic substance 22 and a reproduction optical transmission hole 25 is provided at the nearly center of the nonmagnetic substance 22. Then a flat convex lens 26 functioning as an objective lens is arranged on the reproducing optical transmission hole 25. Since the flat convex lens of the reproducing system is incorporated to the slider 24 of the recording system, the miniaturization of the magnetic recording and reproducing device is realized. Further, the Winchester head 21 is arranged so that it comes timewise earlier than the hole 25 and the distance between the both is shorter remarkably than that of a conventional device, then the recording state is confirmed almost simultaneously.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a magnetic recording optical reproducing device.

BACKGROUND ART AND PROBLEMS In recent years, research has been actively conducted on high-density recording and reproducing systems, such as magnetic recording and optical reproducing systems, that utilize magneto-optical effects using magnetic thin films that are magnetized in the perpendicular direction.

In this method, for example, as shown in FIG. 1, information (4) is magnetically recorded by a magnetic head onto a magnetic medium (3) K in which a magnetic film (2) is formed on a base (1).

To reproduce the information recorded in this way, for example, Rade light is converted into linearly polarized light (5) by a polarizer and irradiated directly onto the magnetic thin film (2), and the plane of polarization is rotated by reflection on the film surface. This reflected light (
5y is detected through an analyzer.

Magnetic recording optical reproducing apparatuses based on this method have conventionally been used, for example, as shown in FIG. As shown in J, an arm (141) that supports a slide/a (13) having a Winchester head (aI) constituting a recording system via a gimbal spring (141) and a radar head (141) constituting a reproduction system. It consists of a diode a field, a polarizer (8), a half mirror aQ, an objective lens αη, an analyzer (9) for detecting the reflected Läde member after being irradiated onto the magneto-optical disk Qs, and a light-receiving element. Therefore, since the recording system and playback system were arranged independently as in the case of Jin, the device became larger and there was a time delay between recording and playback.
There were some drawbacks.

As shown in FIG. 3, the conventional slide/(11), including the Winchester head αυ, is entirely made of a soft magnetic material.

Purpose of the Invention In view of the above-mentioned points, the present invention provides a magnetic recording optical reproducing device that can reduce the size of the device and improve the time delay from recording to reproduction. Ruru.

SUMMARY OF THE INVENTION The present invention is a magnetic recording optical reproducing apparatus in which a slide I having a recording magnetic head element section is provided with a reproducing light transmission hole.

With the above configuration, the apparatus can be made smaller, and the time delay from recording to reproduction can be improved, and, for example, almost simultaneous monitoring can be performed.

Embodiment In the present invention, as shown in FIGS. 4 and 5, a Winchester head (
(C) is included in the slide/(C) is a soft magnetic material part)
The other part of the slide/(c) is formed of a non-magnetic material part (2
), and a reproduction light transmission hole () is provided approximately in the center of this non-magnetic portion (a). For example, ceramics, glass, and glass ceramics can be used as the material for the nonmagnetic portion (2). Above this reproduction light transmission hole) is a plano-convex lens (
Place c). Note that only the core portion (C) of the Winchester head (C) including the operating gap (support) may be formed of a soft magnetic material.

Next, FIG. 6 shows an embodiment of a magnetic recording optical reproducing apparatus using the above-mentioned Sly/(c). In this device, the Winchester head (c) is positioned temporally earlier than the reproduction light transmission hole (with respect to the traveling direction (a) of the magneto-optical disk (a)). Then, the slider (goods) is supported by the arm 0→ via the gimbal spring ◇). Further, an optical reproducing system (1) is arranged at an upper position corresponding to the reproducing light transmission hole (C), and this optical reproducing system (1) and arm 0 of the recording system are supported by the same rigid support. Optical regeneration system (
Although not shown in the figure, for example, the laser beam (b) is irradiated onto the disk surface through a polarizer, a half mirror, and an objective lens), and the reflected light is sent to the half mirror 1 detector. The photons can be configured to pass through and be detected by a photodetector.

According to the above invention, since the plano-convex lens of the reproducing system is combined with the slide/(c) of the recording system, it is possible to downsize the magnetic recording and reproducing apparatus. In addition, the Winchester head Q is arranged so that it comes temporally earlier than the reproduction light transmission hole (b), and the distance between the two is significantly shorter than in conventional devices. This allows you to check the recording status at a single time. Since the slide portion where the plano-convex lens e (c) is placed is made of a non-magnetic material, the radar light (b) passing through the reproduction light transmission hole (to) is affected by the magnetic field. Not affected. During operation, the slide/(c) can be floated and the distance from the magneto-optical disk 4 can be maintained at 0.5 μm, so the focal length of the plano-convex lens (c) can basically be secured.

Effects of the Invention According to the present invention, since the slider having the magnetic head element section for recording is provided with a light transmission hole for reproduction, it is possible to downsize the apparatus and improve the time delay between recording and reproduction. be able to.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a magnetic medium used to explain magneto-optical recording.
FIG. 2 is a schematic diagram of a conventional magnetic recording optical reproducing device, FIG. 3 is a perspective view of a conventional slider, FIG. 4 is a perspective view of slide I according to the present invention, and FIG. 5 is a sectional view thereof. Figure 6 is a schematic diagram of this magnetic recording optical reproducing device.
(a) is a magnetic material part, (a) is a slider, and (c) is a reproduction light transmission hole. Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] A magnetic recording optical reproducing device comprising a slider having a recording magnetic head element portion and a reproducing light transmission hole provided therein.